225 lines
10 KiB
C++
225 lines
10 KiB
C++
/***************************************************************************
|
|
* Copyright (c) 2010 Juergen Riegel <FreeCAD@juergen-riegel.net> *
|
|
* *
|
|
* This file is part of the FreeCAD CAx development system. *
|
|
* *
|
|
* This library is free software; you can redistribute it and/or *
|
|
* modify it under the terms of the GNU Library General Public *
|
|
* License as published by the Free Software Foundation; either *
|
|
* version 2 of the License, or (at your option) any later version. *
|
|
* *
|
|
* This library is distributed in the hope that it will be useful, *
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
|
* GNU Library General Public License for more details. *
|
|
* *
|
|
* You should have received a copy of the GNU Library General Public *
|
|
* License along with this library; see the file COPYING.LIB. If not, *
|
|
* write to the Free Software Foundation, Inc., 59 Temple Place, *
|
|
* Suite 330, Boston, MA 02111-1307, USA *
|
|
* *
|
|
***************************************************************************/
|
|
|
|
|
|
#include "PreCompiled.h"
|
|
#ifndef _PreComp_
|
|
# include <Bnd_Box.hxx>
|
|
# include <gp_Dir.hxx>
|
|
# include <gp_Pln.hxx>
|
|
# include <BRep_Builder.hxx>
|
|
# include <BRepAdaptor_Surface.hxx>
|
|
# include <BRepBndLib.hxx>
|
|
# include <BRepFeat_MakePrism.hxx>
|
|
# include <BRepBuilderAPI_MakeFace.hxx>
|
|
# include <Geom_Plane.hxx>
|
|
# include <Handle_Geom_Surface.hxx>
|
|
# include <TopoDS.hxx>
|
|
# include <TopoDS_Face.hxx>
|
|
# include <TopoDS_Wire.hxx>
|
|
# include <TopoDS_Solid.hxx>
|
|
# include <TopExp_Explorer.hxx>
|
|
# include <BRepAlgoAPI_Cut.hxx>
|
|
# include <BRepPrimAPI_MakeHalfSpace.hxx>
|
|
# include <BRepAlgoAPI_Common.hxx>
|
|
#endif
|
|
|
|
#include <Base/Exception.h>
|
|
#include <Base/Placement.h>
|
|
#include <App/Document.h>
|
|
|
|
#include "FeaturePocket.h"
|
|
|
|
|
|
using namespace PartDesign;
|
|
|
|
const char* Pocket::TypeEnums[]= {"Length","ThroughAll","UpToFirst","UpToFace",NULL};
|
|
|
|
PROPERTY_SOURCE(PartDesign::Pocket, PartDesign::SketchBased)
|
|
|
|
Pocket::Pocket()
|
|
{
|
|
addSubType = FeatureAddSub::Subtractive;
|
|
|
|
ADD_PROPERTY_TYPE(Type,((long)0),"Pocket",App::Prop_None,"Pocket type");
|
|
Type.setEnums(TypeEnums);
|
|
ADD_PROPERTY_TYPE(Length,(100.0),"Pocket",App::Prop_None,"Pocket length");
|
|
ADD_PROPERTY_TYPE(UpToFace,(0),"Pocket",App::Prop_None,"Face where pocket will end");
|
|
ADD_PROPERTY_TYPE(Offset,(0.0),"Pocket",App::Prop_None,"Offset from face in which pocket will end");
|
|
static const App::PropertyQuantityConstraint::PropertyQuantityConstraint::Constraints
|
|
signedLengthConstraint = {-DBL_MAX, DBL_MAX, 1.0};
|
|
Offset.setConstraints ( &signedLengthConstraint );
|
|
}
|
|
|
|
short Pocket::mustExecute() const
|
|
{
|
|
if (Placement.isTouched() ||
|
|
Type.isTouched() ||
|
|
Length.isTouched() ||
|
|
Offset.isTouched() ||
|
|
UpToFace.isTouched())
|
|
return 1;
|
|
return SketchBased::mustExecute();
|
|
}
|
|
|
|
App::DocumentObjectExecReturn *Pocket::execute(void)
|
|
{
|
|
// Handle legacy features, these typically have Type set to 3 (previously NULL, now UpToFace),
|
|
// empty FaceName (because it didn't exist) and a value for Length
|
|
if (std::string(Type.getValueAsString()) == "UpToFace" &&
|
|
(UpToFace.getValue() == NULL && Length.getValue() > Precision::Confusion()))
|
|
Type.setValue("Length");
|
|
|
|
// Validate parameters
|
|
double L = Length.getValue();
|
|
if ((std::string(Type.getValueAsString()) == "Length") && (L < Precision::Confusion()))
|
|
return new App::DocumentObjectExecReturn("Pocket: Length of pocket too small");
|
|
|
|
Part::Part2DObject* sketch = 0;
|
|
std::vector<TopoDS_Wire> wires;
|
|
try {
|
|
sketch = getVerifiedSketch();
|
|
wires = getSketchWires();
|
|
} catch (const Base::Exception& e) {
|
|
return new App::DocumentObjectExecReturn(e.what());
|
|
}
|
|
|
|
// if the Base property has a valid shape, fuse the prism into it
|
|
TopoDS_Shape base;
|
|
try {
|
|
base = getBaseShape();
|
|
} catch (const Base::Exception&) {
|
|
return new App::DocumentObjectExecReturn("No sketch support and no base shape: Please tell me where to remove the material of the pocket!");
|
|
}
|
|
|
|
// get the Sketch plane
|
|
Base::Placement SketchPos = sketch->Placement.getValue();
|
|
Base::Rotation SketchOrientation = SketchPos.getRotation();
|
|
Base::Vector3d SketchVector(0,0,1);
|
|
SketchOrientation.multVec(SketchVector,SketchVector);
|
|
|
|
// turn around for pockets
|
|
SketchVector *= -1;
|
|
|
|
try {
|
|
this->positionByPrevious();
|
|
TopLoc_Location invObjLoc = this->getLocation().Inverted();
|
|
|
|
base.Move(invObjLoc);
|
|
|
|
gp_Dir dir(SketchVector.x,SketchVector.y,SketchVector.z);
|
|
dir.Transform(invObjLoc.Transformation());
|
|
|
|
TopoDS_Shape sketchshape = makeFace(wires);
|
|
if (sketchshape.IsNull())
|
|
return new App::DocumentObjectExecReturn("Pocket: Creating a face from sketch failed");
|
|
sketchshape.Move(invObjLoc);
|
|
|
|
std::string method(Type.getValueAsString());
|
|
if (method == "UpToFirst" || method == "UpToFace") {
|
|
if (base.IsNull())
|
|
return new App::DocumentObjectExecReturn("Pocket: Extruding up to a face is only possible if the sketch is located on a face");
|
|
|
|
// Note: This will return an unlimited planar face if support is a datum plane
|
|
TopoDS_Face supportface = getSupportFace();
|
|
supportface.Move(invObjLoc);
|
|
|
|
if (Reversed.getValue())
|
|
dir.Reverse();
|
|
|
|
// Find a valid face or datum plane to extrude up to
|
|
TopoDS_Face upToFace;
|
|
if (method == "UpToFace") {
|
|
getUpToFaceFromLinkSub(upToFace, UpToFace);
|
|
upToFace.Move(invObjLoc);
|
|
}
|
|
getUpToFace(upToFace, base, supportface, sketchshape, method, dir, Offset.getValue());
|
|
|
|
// BRepFeat_MakePrism(..., 2, 1) in combination with PerForm(upToFace) is buggy when the
|
|
// prism that is being created is contained completely inside the base solid
|
|
// In this case the resulting shape is empty. This is not a problem for the Pad or Pocket itself
|
|
// but it leads to an invalid SubShape
|
|
// The bug only occurs when the upToFace is limited (by a wire), not for unlimited upToFace. But
|
|
// other problems occur with unlimited concave upToFace so it is not an option to always unlimit upToFace
|
|
// Check supportface for limits, otherwise Perform() throws an exception
|
|
TopExp_Explorer Ex(supportface,TopAbs_WIRE);
|
|
if (!Ex.More())
|
|
supportface = TopoDS_Face();
|
|
BRepFeat_MakePrism PrismMaker;
|
|
PrismMaker.Init(base, sketchshape, supportface, dir, 0, 1);
|
|
PrismMaker.Perform(upToFace);
|
|
|
|
if (!PrismMaker.IsDone())
|
|
return new App::DocumentObjectExecReturn("Pocket: Up to face: Could not extrude the sketch!");
|
|
TopoDS_Shape prism = PrismMaker.Shape();
|
|
|
|
// And the really expensive way to get the SubShape...
|
|
BRepAlgoAPI_Cut mkCut(base, prism);
|
|
if (!mkCut.IsDone())
|
|
return new App::DocumentObjectExecReturn("Pocket: Up to face: Could not get SubShape!");
|
|
// FIXME: In some cases this affects the Shape property: It is set to the same shape as the SubShape!!!!
|
|
TopoDS_Shape result = refineShapeIfActive(mkCut.Shape());
|
|
this->AddSubShape.setValue(result);
|
|
this->Shape.setValue(prism);
|
|
} else {
|
|
TopoDS_Shape prism;
|
|
generatePrism(prism, sketchshape, method, dir, L, 0.0,
|
|
Midplane.getValue(), Reversed.getValue());
|
|
if (prism.IsNull())
|
|
return new App::DocumentObjectExecReturn("Pocket: Resulting shape is empty");
|
|
|
|
// set the subtractive shape property for later usage in e.g. pattern
|
|
prism = refineShapeIfActive(prism);
|
|
this->AddSubShape.setValue(prism);
|
|
|
|
// Cut the SubShape out of the base feature
|
|
BRepAlgoAPI_Cut mkCut(base, prism);
|
|
if (!mkCut.IsDone())
|
|
return new App::DocumentObjectExecReturn("Pocket: Cut out of base feature failed");
|
|
TopoDS_Shape result = mkCut.Shape();
|
|
// we have to get the solids (fuse sometimes creates compounds)
|
|
TopoDS_Shape solRes = this->getSolid(result);
|
|
if (solRes.IsNull())
|
|
return new App::DocumentObjectExecReturn("Pocket: Resulting shape is not a solid");
|
|
solRes = refineShapeIfActive(solRes);
|
|
remapSupportShape(solRes);
|
|
this->Shape.setValue(solRes);
|
|
}
|
|
|
|
return App::DocumentObject::StdReturn;
|
|
}
|
|
catch (Standard_Failure) {
|
|
Handle_Standard_Failure e = Standard_Failure::Caught();
|
|
if (std::string(e->GetMessageString()) == "TopoDS::Face" &&
|
|
(std::string(Type.getValueAsString()) == "UpToFirst" || std::string(Type.getValueAsString()) == "UpToFace"))
|
|
return new App::DocumentObjectExecReturn("Could not create face from sketch.\n"
|
|
"Intersecting sketch entities or multiple faces in a sketch are not allowed "
|
|
"for making a pocket up to a face.");
|
|
else
|
|
return new App::DocumentObjectExecReturn(e->GetMessageString());
|
|
}
|
|
catch (Base::Exception& e) {
|
|
return new App::DocumentObjectExecReturn(e.what());
|
|
}
|
|
}
|
|
|